/*
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
 *
 * This file is part of retabel.
 *
 * Copyright (c) 2011 by individual contributors as indicated by the
 * @author tags. See the copyright.txt file in the distribution
 * for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.retabel.persistence.dao.render;

import org.retabel.persistence.dao.AbstractEntityDaoBean;
import org.retabel.persistence.entity.document.DocumentConfiguration;
import org.retabel.persistence.entity.render.RenderedDocument;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.ejb.Stateless;
import javax.ejb.TransactionAttribute;
import javax.ejb.TransactionAttributeType;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.PersistenceContext;
import javax.persistence.Query;

/**
 * Class description.
 * <p/>
 * <h3>Extra-Info</h3>
 * Created: 20:16 14.09.11
 *
 * @author Burt Parkers
 * @version 1.0
 */
@Stateless
@TransactionAttribute(TransactionAttributeType.SUPPORTS)
public class RenderedDocumentDaoBean extends AbstractEntityDaoBean<RenderedDocument> implements RenderedDocumentDao {

    private static final Logger logger = LoggerFactory.getLogger(RenderedDocumentDaoBean.class);

    /** The EntityManager. */
    @PersistenceContext(unitName = "retabel-persistence")
    private EntityManager entityManager;

    public RenderedDocumentDaoBean() {
        super(RenderedDocument.class);
    }

    @Override
    protected EntityManager getEntityManager() {
        return entityManager;
    }

    @Override
    public RenderedDocument findByDocumentIdentifier(String documentIdentifier) {
        try {
            Query query = entityManager.createNamedQuery("RenderedDocument.findByDocumentIdentifier");
            query.setParameter(1, documentIdentifier);
            return (RenderedDocument) query.getSingleResult();
        } catch (NoResultException e) {
            return null;
        }
    }

    @Override
    public void remove(RenderedDocument renderedDocument) {
        if (!entityManager.contains(renderedDocument)) {
            // attach rendered document
            renderedDocument = entityManager.merge(renderedDocument);
        }

        DocumentConfiguration documentConfiguration = renderedDocument.getDocumentConfiguration();

        // remove the rendered document
        entityManager.remove(renderedDocument);

        switch (documentConfiguration.getConfigurationType())
        {
            case TEMPORARY: {
                // delete the temporary document configuration aswell
                entityManager.remove(documentConfiguration);

                break;
            }
        }
    }
}
